<template>
  <div>
    <!--面包屑-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片区域-->
    <el-card>
      <!--提示条-->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!--步骤条-->
      <el-steps :space="200" :active="activeIndex-0" align-center finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClick"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="categoryList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              class="upload-demo"
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleUploadSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog title="图片预览" :visible.sync="prePicVisible" width="50%">
      <el-image :src="preViewUrl" class="pre_view"></el-image>
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      // 添加商品部分
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
          { min: 1, max: 50, message: '长度在 1 到 50 个字符', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      categoryList: [],
      manyTableData: [],
      onlyTableData: [],
      // 图片上传后台接口
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传图片headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览地址
      preViewUrl: '',
      prePicVisible: false
    }
  },
  created() {
    this.getCategoryList()
  },
  methods: {
    async getCategoryList() {
      const { data: res } = await this.$http.get('categories')
      if (res && res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.categoryList = res.data
    },
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave() {
      if (this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
      return true
    },
    async tabClick() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          'categories/' + this.cateId + '/attributes',
          { params: { sel: 'many' } }
        )
        if (res && res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      }
      if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          'categories/' + this.cateId + '/attributes',
          { params: { sel: 'only' } }
        )
        if (res && res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        this.onlyTableData = res.data
      }
    },
    handlePreview(file) {
      this.preViewUrl = file.response.data.url
      this.prePicVisible = true
    },
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const fileIndex = this.addForm.pics.findIndex(
        x => x.tmp_path === filePath
      )
      this.addForm.pics.splice(fileIndex, 1)
    },
    handleUploadSuccess(res) {
      const picObj = { pic: res.data.tmp_path }
      this.addForm.pics.push(picObj)
    },
    add() {
      this.$refs.addFormRef.validate(async validate => {
        if (!validate) {
          return this.$message.error('请填写必要的表单项')
        }
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 动态参数和静态属性处理
        this.manyTableData.forEach(
          item => {
            const newData = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals.join(' ')
            }
            this.addForm.attrs.push(newData)
          }
        )
        this.onlyTableData.forEach(
          item => {
            const newData = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals
            }
            this.addForm.attrs.push(newData)
          }
        )
        form.attrs = this.addForm.attrs
        const { data: res } = await this.$http.post('goods', form)
        if (res && res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success(res.meta.msg)
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length !== 3) {
        return null
      }
      return this.addForm.goods_cat[2]
    }
  }
}
</script>
<style lang="less" scoped>
.el-cascader {
  width: 500px;
}
.el-checkbox {
  margin: 0 15px 0 0 !important;
}
.pre_view {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>
